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Author Topic: 18pin DIP microcontroller identification (Not PIC)  (Read 1891 times)
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medik
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« on: September 04, 2014, 08:36:37 20:36 »

I am trying to identify an 18pin DIP microcontroller in a circuit.  The details I know about the chip from the circuit are thus:
VDD @ pin 12, VSS @ pin 9, reset @pin 11, pins 7&8 were used for ADC input. other pins as I/o ports.

I know that PIC microcontroller has pin14 as vdd and vss at pin 5, reset / MCLR at pin 4 for 18pin configuration.

Anyone know the family of this microcontroller with the pin details. Physically,  it looks like regular 18pin dip picmicro eg pic16f628.
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CocaCola
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« Reply #1 on: September 04, 2014, 09:02:38 21:02 »

Any idea on the date of manufacture, that might help limit the manufactures down as well as series...

Also it could be proprietary...
« Last Edit: September 04, 2014, 09:59:40 21:59 by CocaCola » Logged
pickit2
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« Reply #2 on: September 04, 2014, 11:08:16 23:08 »

microchip and others will & do supply custom wire from ic die, to chip header/carrier.
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CocaCola
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« Reply #3 on: September 05, 2014, 12:38:59 00:38 »

microchip and others will & do supply custom wire from ic die, to chip header/carrier.

Yep, quite common so that parts are universal for legacy products aka drop in replacement for out of production (or shared production) parts so that a board re-design isn't necessary...
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medik
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« Reply #4 on: September 05, 2014, 02:32:00 02:32 »

microchip and others will & do supply custom wire from ic die, to chip header/carrier.

Yep, quite common so that parts are universal for legacy products aka drop in replacement for out of production (or shared production) parts so that a board re-design isn't necessary...

I never thought of the possibility of  custom wire of pins from a manufacturer like microchip. Now i know it's possible.

I forgot to add that the chip uses an internal oscillator to function.

underneath the chip, LQ7A1023N is printed while "GO" is embossed centrally.

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PICker
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« Reply #5 on: November 22, 2014, 11:00:16 23:00 »

Did you find the IC as part of a specific circuit?
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medik
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« Reply #6 on: November 27, 2014, 10:28:21 10:28 »

Did you find the IC as part of a specific circuit?
Yes, it was part of a specific circuit board. I've studied it and implemented with Microchip pic. obviously,  was a custom chip
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